.nav {
  position: fixed;
  bottom: 0;
  width: 100%;
  height: 50px;
  text-align: center;
  background-color: #fff;
  box-shadow: 0 0 10px 0 rgba(222, 222, 222, 0.6);
  max-width: 800px;
  i {
    font-size: 25px;
    line-height: 32px;
  }
  span {
    line-height: 10px;
    display: block;
  }
  .select {
    i {
      color: #0089FF;
    }
    span {
      color: #0089FF;
    }
  }
}
